•			In the 2nd persons of the singular and of the plural,
		the negative imperative is constructed thus:

						do not (or don't) + infinitive without to

		Example: 		Don't touch that.
										Don't be silly!

•			In polite speech, in the 1st person of the plural, the
		negative imperative is formed thus:

						let + us + not + infinitive without to

		Example: 		Let's (us) not argue.